Help test GlassMeter.
A professional light meter with a medium-format soul — and you get it before everyone else. Three steps, two minutes.
1
Get TestFlight
TestFlight is Apple's free app for testing pre-release apps. Install it from the App Store if you don't have it.
2
Tap the invite
Open the invite link below on your iPhone. It opens in TestFlight — tap Accept, then Install.
3
Point it at the light
Open GlassMeter, allow camera access, and meter something. That's it — updates arrive automatically through TestFlight.
What to try
- Tap the finder to spot-meter a tone; tap the spot again to pin it. Pin a shadow and a highlight and watch the meter split the difference.
- Load different films — try Velvia 50, then Portra 400, then Tri-X — and judge the look in the finder and in your captures.
- Turn the shutter dial past 1s to B and run the Bulb countdown.
- On a Pro iPhone: watch the rangefinder distance and depth-of-field scale on the left edge.
- Shoot a few frames, then open the library — every frame keeps its film, lens, and exposure settings.
- Speak another language? Set your iPhone to it — GlassMeter ships in 34.
Found something off?
Take a screenshot inside the app — TestFlight will ask if you want to send it as beta feedback (add a note and hit send; it comes straight to the developer). Or open TestFlight → GlassMeter → Send Beta Feedback. Crashes report themselves automatically.
Beta builds expire after 90 days — TestFlight will offer the newest build
automatically. Nothing leaves your phone: no account, no analytics, no
tracking. Privacy policy.